In a Rare Disease, Individuals Suffer from Bone Marrow Failure

In a rare disease, individuals suffer from bone marrow failure due to the inability of this blood-forming tissue to produce a sufficient number of blood cells over a human lifetime. What is NOT a cause of this condition?

A) Individuals have greatly elevated telomerase levels.
B) Individuals have greatly reduced telomerase levels.
C) Individuals are heterozygous for the gene that encodes the telomerase RNA.
D) Individuals are heterozygous for the gene that encodes the telomerase protein subunit.

Correct Answer:

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